India Belum Caves, Kurnool

The Belum Caves is the largest and longest cave system open to the public on the Indian subcontinent, known for its speleothems, such as stalactite and stalagmite formations. The Belum Caves have long passages, galleries, spacious caverns with fresh water and siphons. This natural underground cave system was formed over the course of tens of thousands of years by the constant flow of underground water. The cave system reaches its deepest point ( 46 m (151 ft) from entrance level).

Belum Caves have a length of 3,229 m (10,593.8 ft), making them the second largest natural caves on the Indian Subcontinent after the Krem Liat Prah caves in Meghalaya.